Bogie



March 27, 1934. H. NYFFENEGGER 1,952,819

BOGIE Filed March 30. 1955 www@ 111W '11W W MIU f7@ 2.

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Patented Mar. 27, 1934 UNITED STATES PATENT OFFICE BOGIE ApplicationMarch 30, 1933, Serial No. 663,615 In Germany April 2, 1932 5 Claims.

This invention relates to bogies for rail guided vehicles.

With rail guided vehicles, the amount of guidance afforded by the trackfor the vehicle and the adaptability of the vehicle to high speed trafcdepend to a great deal on the particular construction and runningqualities of the leading bogie. For this reason, this matter was givenmost careful attention by designers of railway vehicles from the start,as a result of which in the course of time a few standard types ofbogies were derived from a great number of proposals.

The earlier constructions were based upon the principle of transmittingthe load from the main frame to the individual bogie frames by means ofa single pivot pin which is situatedin the middle plane of the vehiclebetween the axles of the bogie and which provides at the same time thenecessary centering for the bogie. With the adoption of large interiorcylinders for steam locomotives, this construction could, however, nolonger be applied, due to these cylinders requiring so much space thatit became necessary to employ separate supporting and guide elements.

sary restoring means for resetting the bogie into its middle position.

In rail guided motor driven vehicles having loose axles with gear wheelsarranged above the bogie, the requirement of space for the parts of thelatter is a matter of still greater importance than with steamlocomotives with interior cylinders. The two devices serving entirelydifferent purposes, viz. the supporting arrangement inclusive of thecentering means for bogie and the said restoring means on the one hand,and the driving device on the other hand interfere with each other insuch a detrimental manner that, hitherto, the only thing that could bedone was to choose between two unsatisfactory solutions. One of thesesolutions consists in the arrangement of the gear wheels of the looseaxles on the outside of the main frame in cantilevered disposition, andthe other in disposing these gear wheels in a preferred manner betweenthe bearings of the loose axles on the inside of the main frame.

The first mentioned arrangement rendered possible a proper design forthe bogie, but in respect of the gear wheel drives, particularly whengears of a high driving effect were involved, conditions arose underwhich a permanently satisfactory operation of the gears was not ensured.The other arrangement resulted in very poor constructions of the bogiesand sometimes even of the main frame.

According to the invention a bogie construction is provided whichcomprises an unobstructed space, for the accommodation of driving meansand the like, between theaxles of the bogie, adapting the latter for useas a leading bogie for very high speed traction.

The transmission of forces and loads from the main frame to the bogieframe is effected by supporting members in the form of two-armed leversor else by four bell crank levers that are interconnected in pairs bybars that are adapted to take tensile and compressive stressesrespectively. With this arrangement the forward or rearward bell cranklevers respectively can be esy carried by a common shaft which ismounted in Fig. 1 is a view of a bogie which is particularly adapted forrunning in the direction of the arrow A shown and which comprises bellcrank levers that are arranged interiorly of the frame on both sidesthereof and interconnected by bars resistive against tension andcompression for thrust transmission;

Fig. 2 shows a modification of Fig. 1, and

Fig. 3 represents a bogie which is also particularly adapted to run inthe direction of the arrow A shown and which comprises two-armed leversthat are arranged interiorly of the frame on both sides thereof forthrust transmission.

As shown in Fig. 1, in the main frame 1, of which only the left handside wall is illustrated, four bell crank levers 2 for motion equalizingpurposes are mounted by means of pivots 3, the arrangement being sochosen that the forward and rearward bell crank levers respectively arearranged in pairs on a common pivot. Each of the bell crank levers 2 isprovided with an arm 4 of substantially horizontal disposition, and asubstantially vertically disposed arm 5 which may be downwardlydirected, as shown, or else upwardly directed. The levers of the sameside of the bogie frame are interconnected by bars 6 which are adaptedto take tension and compression respectively. The outer ends of the arms4 of the bell crank levers 2 bear against a pivotal plate 8 and a slideplate 9 respectively by means of shoes 7, thus transmitting the portionof the weight of the main frame to be carried by the bogie to theseplates.

The double axle boxes l0 which may be integral with the bogie frame andwhich receive the axles and associated wheels carry slides 11, 12 whichare adapted to perform lateral movements at right angles to thedirection of running relatively to the double axle boxes 10. The pivotalplate 8 and the slideable plate 9 respectively are mounted in the slides11 and 12, the pivotal plate 8 being forwardly disposed as regards themain direction of running (arrow A) and connected with the slide 11 bymeans of a central pivot pin 13. This pivot pin may be secured to thepivotal plate 8 or to the slide 11, so that the bogie is adapted toperform horizontal turning movements relatively to the main frame whileit is dragged along by this frame. On the other hand the slides 11 and12 permit displacements of the bogie parallel to the same also in thedistorted positions of the bogie. The transmission of the loading fromthe bogie frame to the axles of the bogie is effected, in a knownmanner, by intervening springs and equalizing levers for lateralshifting movements which, for the sake of clearness, are not shown inthe drawing. The same applies to the usual restoring device forresetting the bogie into its middle position and comprising elements,such as bell crank levers provided with rollers, linkages and springs,and acting on the bogie forwardly and rearwardly at the outer endsthereof, as at 14 and 15, in the directions of the arrows 16 or 17respectively. 'Ihe space 18 between the double axle boxes is reservedfor the accommodation of gear wheels and other driving members and soforth. The fact that while running in the opposite direction to thatindicated, by the arrow A, the bogie is pushed along by the main frameis irrelevant, as during the rearward movement the speed of the vehicleis always much smaller than during the forward movement. y

In the constructional example of the invention, as shown in Fig. 2,which, however, is equally suitable for forward and rearward running,instead of the arrangement of a pivot pin, for interconnecting the mainframe and the bogie frame, cylindric bearing faces 19 are provided onthe slides 11 and 12 for cooperation with counter bearing faces 20 onthe bogie frame. Clearance is provided between the inner sides of theslides 11 and 12 and the corresponding facings of the axle boxes inwhich the slides are located to permit the turning motion cf the bogie.

In the constructional example of the invention illustrated in Fig. 3 thetransmission of the loading from the main frame to the bogie is effectedby means of two-armed levers 2l disposed interiorly of the bogie frameand mounted in the main frame by means of pivot shafts 22. The two-armedlevers rest with their shoes '7 against the pivotal plate 8 and theslidable plate 9 respectively, thus transmitting the portion of theweight of the main frame to be counteracted by the bogie to theseplates. Alternatively, the

slide 12 may be omitted or replaced by an immovably arranged bearingplate.

rlhe supporting device for transmitting the weight ofthe main frame tothe bogies can be modified in various ways, but so that in every case afree space 18 is provided between the two axles, for receiving drivingmembers and the like.

It will be readily seen that also the constructional form of theinvention as per Fig. 3 may be modified on the principle as disclosed inFig. 2, i. e. by replacing the pivot pin 13, shown in Fig. 3, by twopairs of correlated cylindric bearing faces, as illustrated in Fig. 2.

Instead of using four individual levers interconnected in pairs byconnecting bars or twoarmed levers, as shown in the Figs. 1 and 3respectively, a single pair of levers or a single twoarmed lever may beemployed. Alternatively, two individual levers may be provided for theforward slide and only one individual lever for the rearward slide, theforward levers being provided with depending arms, as shown in Fig. l,Whereas the corresponding arm of the rearward lever is fork-shaped forengaging the two connecting bars extending backwardly from the twoforward levers.

I do not limit myself to the particular size, shape, number orarrangement of parts as shown and described, all of which may be variedwithout going beyond the scope of my invention as shown, described andclaimed.

What I claim is:

l. In a two-axle bogie for rail guided vehicles, in combination, a mainframe of the vehicle, a 110 bogie frame, carrying a portion of theweight of said main frame, a motion equalizing leverage intercalatedbetween said main frame and said bogie frame, a forward and a rearwarddouble axle box arranged in said bogie frame, a slide mounted in eachaxle box and adapted to freely shift relatively to the box in thetransverse directic'n of the vehicle, and an adjustable bearing platedisposed for said leverage in each of said slides, the whole arrangementsuchwise, that an unobstructed space is provided between said forwardand rearward double axle boxes.

2. In a two-axle bogie for rail guided vehicles, in combination, a mainframe of the vehicle, a bogie frame, carrying a portion of the weight of125 said main frame, a motion equalizing leverage intercalated betweensaid main frame and said bogie frame, a forward and a rearward doubleaxle box arranged in said bogie frame, a slide mounted in each axle boxand adapted to freely 130 shift relatively to the box in the transversedirection of the vehicle, a slidable bearing plate disposed for saidleverage in the slide of said rearward double axle box, a pivotalbearing plate disposed for said leverage in the slide of said forward135 double axle box, and a vertical pivot pin inserted between the slideof said forward double axle box and said pivotal bearing plate andadapted to transmit the advance movement of said main frame to saidbogie frame, the whole arrange- 140 ment suchwlse, that an unobstructedspace is provided between said forward and rearward double axle boxes.

3. In a two-axle bogie for rail guided vehicles, in combination, a mainframe of the vehicle, a 145 bogie frame, carrying a portion of theweight of said main frame, a motion equalizing leverage intercalatedbetween said main frame and said bogie frame, a forward and a rearwarddouble axle box arranged in said bogie frame, a vertical 150 cylindricbearing face on each of said double axle boxes, a slide mounted in eachaxle box and adapted to freely shift relatively to the box in thetransverse direction of the vehicle, a vertical cylindric counterbearing face on each of said slides mating the bearing face of thecorrelated axle box and adapted to alternately transmit the advancemovement of said main frame to said bogie frame, a slidable bearingplate disposed for said leverage in each of said slides, the wholearrangement suchwlse, that an unobstructed space is provided betweensaid forward and rearward double axle boxes.

4. In a two-axle bogie for rail guided vehicles, in combination, a mainframe of the vehicle, a bogie frame, carrying a portion of the weight ofsaid main frame, at least one bell crank lever for motion equalizationintercalated between said main frame and said bogie frame in the forwardand rearward portion of the latter respectively, a connecting baradapted to take tensile and compressive stresses inserted between eachpair of correlated motion equalizing levers, a forward and a rearwarddouble axle box arranged in said bogie frame, a slide mounted in eachaxle box and adapted to freely shift relatively to the box in thetransverse direction of the vehicle, and an adjustable bearing platedisposed for said levers in each of said slides, the whole arrangementsuchwise, that an unobstructed space is provided between said forwardand rearward double axle boxes. Y

5. In a two-axle bogie for rail guided vehicles, in combination, a mainframe of the vehicle, a bogie frame, carrying a portion of the weight ofsaid main frame, atleast one two-armed lever ior motion equalizationintercalated between said main frame and said bogie frame interiorly ofthe latter, a forward and a rearward double axle box arranged in saidbogie frame, a slide mounted in each axle box and adapted to freelyshift relatively to the box in the transverse direction of the vehicle,and an adjustable bearing plate disposed for adjacent ends of saidtwoarmed levers in each of said slides, the whole arrangement suchwise,that an unobstructed space is provided between said forward and rearwarddouble axle boxes.

HANS NYFFENEGGER.

